net: truncate output file when using dump backend
This prevents data of a previous run to be seen in the new dump file. Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Hervé Poussineau <hpoussin@reactos.org> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>stable-1.1
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6514ed528c
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@ -106,7 +106,7 @@ static int net_dump_init(VLANState *vlan, const char *device,
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DumpState *s;
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DumpState *s;
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int fd;
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int fd;
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fd = open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);
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fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY | O_BINARY, 0644);
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if (fd < 0) {
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if (fd < 0) {
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error_report("-net dump: can't open %s", filename);
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error_report("-net dump: can't open %s", filename);
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return -1;
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return -1;
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